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<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
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  <title>hash router</title>
</head>
<body>
  <ul>
      <li><a href="#/">turn yellow</a></li>
      <li><a href="#/blue">turn blue</a></li>
      <li><a href="#/green">turn green</a></li>
  </ul>
</body>
<script src="./hash.js"></script>
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